Scientific, nautical, surveying, electric, photographic, cinematographic, optical, weighing, measuring, signaling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; data processing equipment and computers; fire extinguishers; software; downloadable digital files authenticated using non-fungible tokens [NFTs]; downloadable software based on blockchain technology; software for digital exhibitions; 3D animation software; virtual and augmented reality software; downloadable mobile applications for the management and transmission of information; information storage apparatus [electric or electronic]; training guides in electronic format; instruction manuals in electronic format; training software; downloadable computer software for information management; computer software for accessing information directories that may be downloaded from the global computer network; downloadable electronic publications; water level indicators; water leak detection alarms; scientific apparatus for determining water content; water meters; water temperature indicators; water temperature regulators; photovoltaic apparatus and installations for generating solar electricity; photovoltaic apparatus for converting solar radiation to electrical energy; gas flow control apparatus and gas flow regulators; alarms for the detection of inflammable gases; solar-powered rechargeable batteries; solar batteries; flue gas and waste gas analyzers; gas detecting instruments; gas analysis and detection apparatus; gasometers [measuring instruments]; solar panels for generating electricity; transformers; power units [transformers]; limiters [electricity]; inverters [electricity]; apparatus and instruments for accumulating and storing electricity; solar panel sets; solar panels; photovoltaic modules; electronic sensors for measuring solar radiation; electricity measuring instruments; civil engineering software.